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Elucidation of prevalence, clinical features and pathogenic mechanism of PDZD7 mutations which was identified as a novel gene causing nonsyndromic hearing loss

Research Project

Project/Area Number 18K19626
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research Institution独立行政法人国立病院機構(東京医療センター臨床研究センター)

Principal Investigator

Matsunaga Tatsuo  独立行政法人国立病院機構(東京医療センター臨床研究センター), 聴覚・平衡覚研究部, 部長 (90245580)

Co-Investigator(Kenkyū-buntansha) 奈良 清光  独立行政法人国立病院機構(東京医療センター臨床研究センター), 聴覚・平衡覚研究部, 研究員 (40260327)
務台 英樹  独立行政法人国立病院機構(東京医療センター臨床研究センター), その他部局等, 研究員 (60415891)
Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords非症候群性難聴 / PDZD7 / 次世代シークエンサー / PDZドメイン / USH2複合体 / アッシャー症候群 / PDZD7遺伝子 / 分子病態
Outline of Final Research Achievements

We genetically analyzed 336 individuals in 334 families, registered as hearing-loss patients who have no other symptoms, with the onsets at 15 years old or under, and with unknown etiology after our routine analysis. Seven patients in 6 families had biallelic variants in PDZD7, a deafness gene. Including 4 patients in 2 families, which were previously detected, the patients exhibited that the onset was at 4 years of age or earlier. Most of the patients showed moderate-level of hearing loss. Variant curation revealed that the 3 variants among the 5 detected ones were pathogenic or likely pathogenic. We constructed expression vectors for green fluorescence protein- and/or 3xflag-tagged PDZD7 and WHRN, which is a protein associated with PDZD7. The vectors are used for in-vitro functional assays to elucidate deficiencies in formation of the protein complexes in the hearing-loss patients.

Academic Significance and Societal Importance of the Research Achievements

現在、次世代シークエンサーの利用によって、一人の患者に多くの遺伝子変異が見つかっているが、エビデンスを基に変異の病的意義を明らかにすることは正しい病態の理解に重要である。今回我々はPDZD7という難聴遺伝子の変異の頻度・病的意義、さらには、典型的な症状、今後の進行の可能性を明らかにした。遺伝情報は、今のところ一生変えることのできない器質であり、患者本人だけでなく家族にも影響する。精度の高い情報により、難聴の原因を特定し、その病態を明らかにすることは、今後の病態の変化を予測し、それに対して医学的に備える一助となる。また、将来の治療法の開発に役立つとともに、難聴者と社会の相互理解にも役立つ。

Report

(2 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2019 2018

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] ClinGen Expert Clinical Validity Curation of 164 Hearing Loss Gene-Disease Pairs2019

    • Author(s)
      DiStefano MT, Hemphill SE, Oza AM., Siegert RK., Grant AR., Hughes MY., Cushman BJ., Azaiez H, Booth KT., Chapin A, Duzkale H, Matsunaga T, Shen J, Zhang W, Kenna M, Schimmenti LA., Tekin M, Rehm HL., Abou Tayoun AN., Amr SS* on behalf of the ClinGen Hearing Loss Clinical Domain Working Group
    • Journal Title

      Genet Med

      Volume: - Issue: 10 Pages: 2239-2247

    • DOI

      10.1038/s41436-019-0487-0

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 「第119回日本耳鼻咽喉科学会総会シンポジウム」難聴のゲノム医療2019

    • Author(s)
      松永達雄
    • Journal Title

      日本耳鼻咽喉科学会会報

      Volume: 122 Pages: 16-21

    • Related Report
      2018 Research-status Report
  • [Journal Article] Expert specification of the ACMG/AMP variant interpretation guidelines for genetic hearing loss2018

    • Author(s)
      Oza AM, et al.
    • Journal Title

      Human Mutation

      Volume: 39 Issue: 11 Pages: 1593-1613

    • DOI

      10.1002/humu.23630

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 先天性難聴児のゲノム診療の意義と動向2018

    • Author(s)
      松永達雄
    • Journal Title

      公衆衛生

      Volume: 82 Pages: 468-473

    • Related Report
      2018 Research-status Report
  • [Journal Article] 遺伝学的診療の進め方2018

    • Author(s)
      松永達雄
    • Journal Title

      耳鼻咽喉科・頭頸部外科

      Volume: 90 Pages: 598-604

    • Related Report
      2018 Research-status Report
  • [Journal Article] 臨床像起点の遺伝性難聴診療の確立2018

    • Author(s)
      松永達雄
    • Journal Title

      Otol Jpn

      Volume: 28 Pages: 65-69

    • NAID

      130007606463

    • Related Report
      2018 Research-status Report
  • [Journal Article] ゲノム医療(遺伝子医療)の今 希少疾患・難病の遺伝カウンセリング2018

    • Author(s)
      松永達雄
    • Journal Title

      保健の科学

      Volume: 60 Pages: 677-681

    • Related Report
      2018 Research-status Report
  • [Presentation] Identification of novel candidate deafness genes by whole exome sequencing in patients with hearing loss.2018

    • Author(s)
      Matsunaga T, Nara K, Inoue S, Yamamoto N, Minami S, Kaga K, Mutai H
    • Organizer
      Corlas Annual Meeting 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 難聴のゲノム医療2018

    • Author(s)
      松永達雄
    • Organizer
      第119回日本耳鼻咽喉科学会 シンポジウム(2)ゲノム医療新時代:耳鼻咽喉科臨床への応用.
    • Related Report
      2018 Research-status Report
  • [Book] 遺伝性難聴の診断の進歩 In:山岨達也 編集.医学のあゆみBOOKS 耳鼻咽喉科診療の進歩 40のエッセンス2018

    • Author(s)
      松永達雄
    • Total Pages
      4
    • Publisher
      医歯薬出版
    • ISBN
      9784263206799
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2023-03-23  

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